<pre class="hljs" data-lang="${data.lang}">
    <div class="code-fn-button">
        <button class="copy-btn" onclick="copy_code(this)">复制</button>
        <button class="fold-btn" onclick="fold_code(this)">折叠</button>
        <button class="expand-btn" onclick="expand_code(this)">展开</button>
    </div>
    <code class="hi ${data.lang}">${data.content}</code>
    <div class="flod-ellipsis">···</div>
</pre>